Pressure-applying means for drafting roll



Aug. 25, 1959 w. w. WERTH PRESSURE-APPLYING MEANS FOR DRAFTING ROLL 2 Sheets-Sheet 1 Filed Feb. 23. 1954 INVENTOR.

WILLIAM W. WERTH 5, 1959 w. w. WERTH 2,900,674

* PRESSURE-APPLYING MEANS FOR DRAFTING ROLL Filed Feb. 23, 1954 2 Sheets-Sheet 2 u H INVENTOR.

WILLIAM w. WERTH.

United States Patent PRESSURE-APPLYING MEANS FOR DRAFTING ROLL William W. Werth, Douglas, Mass, assignor to Machine Works, Whitinsville, Mass., a corporation of Massachusetts Application February 23, 1954, Serial No. 411,635

2 Claims. (Cl. 19-135) are free but are held in firm frictional contact with the bottom rolls.

It is the general object of my invention to provide an improved and simplified construction in such pressureapplying means by which relatively heavy pressure may be easily applied or quickly released. I also provide means for adjustment to compensate for wear of the upper or top roll, together with means for varying the effective pressure on the roll.

My improved pressure-applying means is so mounted that it will hold the top roll in operative relation to the bottom roll, even when the bottom roll is transversely adjusted to vary the drafting space between the front and back rolls.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed, out in the appended claims.

A preferred form of the invention is shovm in the drawings, in which:

Fig. 1 is a side elevation of my improved pressureapplying means;

Fig. 2 is a detail sectional front elevation, taken along the line 22 in Fig. 1;

Fig. 3 is a side elevation, partly in section, taken along the line 33 in Fig. 2; v

Fig. 4 is a sectional rear elevation of a pressureapplying unit, taken along the line 4-4 in Fig. 1;

Fig. 5 is a perspective view of the invention, shown in operative relation to the rolls; and

Fig. 6 is a front elevation of a top roll.

Referring to Figs. 1 and 5, I have shown a continuously rotated lower or bottom roll 10 and a top roll 11 which is indicated in Fig. 6 as comprising separate sliverengaging portions 12 and 13 separated by a bearing portion 15.

The bearing portion 15 is mounted in a spring clip 17 (Fig. l), which in turn is held in a recess 18 in one end of a lever 20. The lever 20 is pivoted at 21 to a bracket 22 extending forward from a stand or unit 23 which is secured to a cross bar 24 by a clamping screw 25.

The ends of each bar 24 are cut away to provide tenons 26 which rest on frame members 30 (Fig. 2) and which extend into slots or recesses 32 in associated bottom roll bearing blocks 33.

With this construction, the stand 23 will be moved transversely with the bearing blocks 33, whenever said blocks are transversely adjusted to vary the drafting space between adjacent pairs of drawing rolls. Consequently, each top roll 11 is always maintained in operative relation to the associated bottom roll 10.

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The stand 23 (Fig; 1) has a cylindrical portion 35 which is internally threaded atits-lower end as indicated at 36 to receive a threaded phig- 37 havingan'on-circular' recess 38 in itslower. face. This recess may receive a wrench for adjustment purposes.

A spring 40'is-mountedinthe' cylindrical portion 35, with its lower end centered onsthe:plug 37 and with its upper end centered undera slidable plunger 42. A shell 44 fits loosely over the upper end of the cylindrical portion 35 and is slotted at one side to clear the bracket 22. This shell 44 moves freely with the plunger 42 and excludes dirt from the inside of the cylindrical portion 35.

A pressure-applying member 50 of U-shaped cross section is pivoted at 51 to the rear end of the lever 20, and is provided with a roll 52 which engages the shell 44 above the plunger 42.

When the member 50 is in the position shown in Figs. 1 and 5, the spring 40 is depressed and pressure is applied to the top roll 11, but when the member 50 is moved to its raised position as indicated in broken lines in Fig. 5, the pressure is relieved and the top roll 11 may be removed from the spring clips 17 for cleaning or other desired purposes.

An adjusting screw 60 (Fig. 4) is threaded in a downward extension 61 of the plunger 42, and the head 62 of the screw is received in an inner recess 63 in the plug 37. The head 62 can turn or slide in the recess 63 and is of less diameter than the recess 38. The head 62 has a non-circular end socket to receive the non-circular end of a wrench in the form of a rod.

By suitable adjustment of the screw 61 its head 62 may be positioned to slightly clear the upper surface of the recess 63 when the lever 50 is in operative position. The head 62 of the screw 6% will engage the upper surface of the recess 63 in the plug 37 and prevent the shell 44 and plunger 42 from following the roll 52 in the lever 50 as the lever Stl is swung upward to release the lever 20 and top roll 11.

The compression of the spring 40 may be adjusted by inserting a suitable wrench in the recess 38 and turning the plug 37 in the threaded portion 36 of the cylindrical portion 35.

An opening 70 in the side of the member 35 will disclose the position of the plug 37, and this position may be read by reference to a scale 72, fixed relative to'the shell 44 and overlying the opening 70. By the use of this scale, the spring may be conveniently restored to a desired compression, if released therefrom for any necessary purpose.

A traverse bar (Fig. 3) is slidable in slots in the bottom roll bearing blocks 33 and carries the usual trumpets which will thus be maintained in desired relation to the drawing rolls without regard to the transverse adjustment of the bearing block 33.

With this construction, any top roll may be released, replaced and tensioned without stopping the frame or interfering with any other rolls.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a textile drafting machine having a continuously rotated bottom roll and having a top roll mounted above said bottom roll and frictionally driven thereby, in combination, a supporting stand permanently mounted in fixed relation to said bottom roll and shiftable transversely therewith but said stand being out of engagement with said bottom roll, a bearing lever pivoted to said stand and having an open-face bearing for said top roll, a spring-pressed slidable plunger in said stand and a pressure-applying lever pivoted to said bearing lever and manually movable to engage said plunger and to 3 thereby transmit predetermined pressure therefrom successively through said pressure-applying lever and said bearing lever to said top roll.

2. The combination in a textile drafting machine as set forth in claim 1, in which auxilary means is provided to offset wear of the top roll while maintaining spring pressure adjustment unchanged.

References Cited in the file of this patent UNITED STATES PATENTS 1,944,966 Casablancas Ian. 30, 1934 4 Harris Apr. 4, 1939 Gwaltney et al. June 22, 1943 Stahlecker a- July 1, 1952 Burnham June 2, 1953 Tarbox et al. Nov. 3, 1953 Ambler Jan. 19, 1954 Giemza Apr. 12, 1955 Ude Sept. 11, 1956 

